package com.atguigu.gulimall.ware.config;

import org.springframework.amqp.core.Binding;
import org.springframework.amqp.core.Exchange;
import org.springframework.amqp.core.Queue;
import org.springframework.amqp.core.TopicExchange;
import org.springframework.amqp.rabbit.annotation.EnableRabbit;
import org.springframework.amqp.support.converter.Jackson2JsonMessageConverter;
import org.springframework.amqp.support.converter.MessageConverter;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import java.util.HashMap;

@EnableRabbit
@Configuration
public class MyRabbitConfig
{
    @Bean
    public MessageConverter messageConverter()
    {
        //在容器中导入Json的消息转换器
        return new Jackson2JsonMessageConverter();
    }

    @Bean
    public Exchange stockEventExchange()
    {
        return new TopicExchange("stock-event-exchange", true, false);
    }

    /**
     * 延迟队列
     *
     * @return
     */
    @Bean
    public Queue stockDelayQueue()
    {
        HashMap<String, Object> arguments = new HashMap<>();
        arguments.put("x-dead-letter-exchange", "stock-event-exchange");
        arguments.put("x-dead-letter-routing-key", "stock.release");
        // 消息过期时间 2分钟
        arguments.put("x-message-ttl", 120000);
        return new Queue("stock.delay.queue", true, false, false, arguments);
    }

    /**
     * 普通队列，用于解锁库存
     *
     * @return
     */
    @Bean
    public Queue stockReleaseStockQueue()
    {
        return new Queue("stock.release.stock.queue", true, false, false, null);
    }


    /**
     * 交换机和延迟队列绑定
     *
     * @return
     */
    @Bean
    public Binding stockLockedBinding()
    {
        return new Binding("stock.delay.queue",
                Binding.DestinationType.QUEUE,
                "stock-event-exchange",
                "stock.locked",
                null);
    }

    /**
     * 交换机和普通队列绑定
     *
     * @return
     */
    @Bean
    public Binding stockReleaseBinding()
    {
        return new Binding("stock.release.stock.queue",
                Binding.DestinationType.QUEUE,
                "stock-event-exchange",
                "stock.release.#",
                null);
    }

}
